Sierra Wireless AirCard 555 - Manual (Page 130)

AirCard 555 Network Card User Guide
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The Dial Pad
The dial pad for the AirCard is in Watcher and is displayed
when you tap the Voice tab. This performs the same functions
as the dial pad on a mobile phone.
Volume
Buttons
Mute
Button
Phone Book
Button
Scratch Pad
Button
Volume
Buttons
Mute
Button
Scratch Pad
Button
Phone Book
Button